A mass diffusion model on the effect of moisture content for solid-state anaerobic digestion. (20th September 2017)

• Record Type: Journal Article
• Authors: Veluchamy, C.; Kalamdhad, Ajay S.
• Is Part Of: Journal of cleaner production. Volume 162(2017)
• Page Start: 371
• Page End: 379
• Publication Date: 2017-09-20
• Subjects: Anaerobic digestion -- Moisture content -- Hydrolysis inhibition -- Mass diffusion -- Methane -- Mathematical model; AD anaerobic digestion -- CH4 methane -- MC moisture content -- SS-AD solid state anaerobic digestion -- LS-AD liquid state anaerobic digestion -- ADM1 anaerobic digestion model no.1 -- PPMS pulp and paper mill sludge -- F/M food to microorganisms -- VS volatile solid -- TS total solid -- NaOH sodium hydroxide -- TKN total Kjeldahl nitrogen -- VFA volatile fatty acid; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2017.06.099
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: The methane production rate increases with a decrease in moisture content up to the optimum threshold level and diminish in a batch reactor fed with the lignocellulosic material in solid state anaerobic digestion. The interpretation on two-faceted effect of moisture content could not be elucidated by the conventional anaerobic digestion model no 1. This study proposed that the decreased moisture content causes augmented mass diffusion resistance by the accumulation of hydrolytic product. This could lead to the reduced production of methane gas. Based on the hypothesis, a new solid state anaerobic digestion model was developed based on mass diffusion limitation and hydrolysis inhibition. The better degree of agreement between model simulation and the literature as well as experimental data verified that the deterioration in the volumetric rate of methane production. This could be attributed to hydrolysis inhibition as a result of limited mass diffusion in solid state anaerobic digestion. Graphical abstract: Schematic sketch illustrate the model hypothesis for solid state anaerobic digestion. Highlights: The effect of moisture content is descried in solid state anaerobic digestion. A mathematical model for solid state anaerobic digestion is developed. Model was developed based on mass diffusion limitation and hydrolysis inhibition. Better degree of agreement between model simulation and experimental results.